Decompression on the fly

Decompression on the fly ( Deco On The Fly , Ratio Deco ) is one of the methods that allows you to calculate decompression dives without using technical means ( decompression computers ) and decompression tables , and then, if necessary, recount decompression obligations during the dive . Simplification of calculations is achieved through the use of the so-called standard set of gas mixtures, which provides an average partial pressure of oxygen (PPO ₂ , PPO2) of 1.2 atm during decompression. It should be noted that decompression on the fly does not cancel the planning of technical immersion.